Gaia DR2 2516606022320239104

All names: 2MASS J02215789+0445179, ** TOK 231B, Gaia DR3 2516606022320239104, SDSS J022157.86+044518.7, WDS J02220+0445B, Gaia DR2 2516606022320239104, WDJ022157.89+044517.91, SDSS J022157.87+044518.8, J0221+0445, TIC 420031397, USNO-B1.0 0947-00023091, Gaia EDR3 2516606022320239104

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 O'Brien et al. 2024 Caron et al. 2023 Kilic et al. 2020 McCleery et al. 2020 Tremblay et al. 2020 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018
Right ascension 02 21 57.86 (0.05) 02 21 57.87 (0.06) 02 21 57.87 02 21 57.86 02 21 57.89 (0.05) 02 21 57.87
Declination 04 45 19.21 (0.04) 04 45 19.17 (0.06) 04 45 19.17 04 45 19.21 04 45 17.91 (0.04) 04 45 19.17
Spectral type DA DA DA DA DA DA DA DA
Effective temperature [K] 7252.0 (17) 7262.0 (113) 7396.0 (15) 7252.0 (17) 7150.1 (96) 7150.0 (100) 7243.0 6975.0 7446.0 (71)
log(g) [cgs] 8.08 (0.005) 8.08 (0.04) 8.13 (0.005) 8.09 (0.005) 8.06 (0.04) 8.06 (0.04) 8.08 7.97 8.14 (0.02)
Mass [M] 0.643 (0.004) 0.643 (0.03) 0.673 (0.005) 0.644 (0.005) 0.642 0.557 0.682 (0.01)
log(Luminosity) [L]
Cooling age [Gyr] 1.6600 1.5480 1.5010
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 25.35 (0.05) 25.35 (0.05) 25.38 (0.07) 25.38 (0.07) 25.38 (0.07) 25.35 25.35 (0.05) 25.38 (0.07)
Distance [pc] 39.45 (0.08) 39.45 (0.08) 39.40 (0.1) 39.40 (0.1) 39.40 (0.1) 39.45 39.45 (0.08) 39.40 (0.1)
Composition H H H
Proper motion (right ascension) [mas/yr] -20.17019249 (0.07) -20.07637547 (0.1) -20.17 (0.07) -20.07637547
Proper motion (declination) [mas/yr] 80.98743831 (0.05) 81.14879788 (0.1) 80.987 (0.05) 81.14879788
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 16.90
V magnitude
R magnitude 16.40
I magnitude
J magnitude 15.82 (0.01) 15.86 (0.08)
H magnitude 15.65 (0.01) 15.59 (0.1)
K magnitude 15.63 (0.02) 15.56 (0.2)
u magnitude 17.04 (0.009) 17.05 (0.009) 17.05 (0.009)
g magnitude 16.58 (0.004) 16.58 (0.004)
r magnitude 16.42 (0.004) 16.42 (0.004)
i magnitude 16.36 (0.004) 16.36 (0.004)
z magnitude 16.46 (0.009) 16.46 (0.009)
G magnitude 16.39 (0.007) 16.41 16.41 16.39 16.39 (0.003) 16.41
BP magnitude 16.57 (0.007) 16.58 16.58
RP magnitude 16.09 (0.007) 16.10 16.10
Pan g magnitude 16.56 (0.001) 16.56 (0.001)
Pan r magnitude 16.43 (0.009) 16.43 (0.009)
Pan i magnitude 16.42 (0.003) 16.42 (0.003)
Pan z magnitude 16.47 (0.004) 16.47 (0.004)
Pan y magnitude 16.50 (0.006) 16.50 (0.004)
E(B-V) 0.001

* Constant surface field

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The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.